WO2013071754A1 - 下行控制信息传输方法和*** - Google Patents

下行控制信息传输方法和*** Download PDF

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Publication number
WO2013071754A1
WO2013071754A1 PCT/CN2012/077550 CN2012077550W WO2013071754A1 WO 2013071754 A1 WO2013071754 A1 WO 2013071754A1 CN 2012077550 W CN2012077550 W CN 2012077550W WO 2013071754 A1 WO2013071754 A1 WO 2013071754A1
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WIPO (PCT)
Prior art keywords
service data
downlink control
control information
transmission time
time interval
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PCT/CN2012/077550
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English (en)
French (fr)
Inventor
陈宪明
关艳峰
左志松
袁弋非
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013071754A1 publication Critical patent/WO2013071754A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a downlink control information transmission method and system for a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access and Long Term Evolution (LTE) is a fourth generation (Fourth Generation, 4G) wireless broadband technology.
  • LTE system can provide high peak data rate (downstream 100Mps, uplink 50Mps), low latency (loopback delay 10ms), improved system capacity and coverage, and reduced operating costs; in addition, it supports multiple antennas, efficient Packet data transfer, flexible bandwidth operation (up to 20MHz) and seamless integration with existing systems. This necessitates efficient and reliable control channel design.
  • the downlink (Downlink, DL for short) control signaling includes scheduling grant, control format indication, and Hybrid Automatic Repeat-ReQuest (HQQ) acknowledgement.
  • HQQ Hybrid Automatic Repeat-ReQuest
  • the LTE system is based on Orthogonal Frequency Division Multiplexing (OFDM), and each downlink frame lasts 10 ms, and includes 10 subframes, each subframe includes two slots, and each slot includes 6 or 7 OFDMes. symbol.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the downlink control signaling is located at the foremost w (less than or equal to 3) OFDM symbols per subframe.
  • the downlink control signaling is carried by the following three physical channels: a Physical Control Format Indicator Channel (PCFICH) for indicating the number of OFDM symbols used for control in the subframe (ie, the “value”);
  • the Physical HARQ Indicator Channel (PHICH) carries the Acknowledgement/Negative Acknowledge (ACK/NACK) related to the uplink data transmission;
  • the Physical Downlink Control Channel (PDCCH) bearer downlink scheduling assignment and uplink scheduling grant.
  • the smallest unit of the PDCCH transmission is a Control Channel Element (CCE), and one PDCCH includes one or more CCEs.
  • CCE Control Channel Element
  • Each CCE contains 9 Resource Element Groups (REGs), and each REG contains 4 non-pilot resource units or subcarriers.
  • Quadrature Phase Shift Keying (QPSK) is always used for the PDCCH. Therefore, one CCE contains 72 coded bits.
  • Each PDCCH carries information with different payload sizes associated with one or more UEs and may be transmitted using different control formats. The UE monitors different PDCCH formats in real time through blind detection, and detects a PDCCH related to itself.
  • the technical problem to be solved by the present invention is to provide a downlink control information transmission method and system to solve the problem that the downlink control channel coverage is limited.
  • the present invention provides a downlink control information transmission method, and the method includes:
  • the network side sends at least two downlink control information related to the predetermined service data to the user equipment, where the indication information of the predetermined service data transmission time interval (TTI) is carried;
  • the user equipment receives and parses the downlink control information.
  • the method further includes: the network side sending or receiving the predetermined service data to the user equipment according to the downlink control information.
  • the method further includes: receiving, according to the downlink control information, the scheduled service data from the network side or to the network side.
  • the downlink control information is sent by using a physical downlink control channel (PDCCH).
  • the indication information is an absolute position or a relative position of a transmission time interval.
  • the network side is before and/or before transmitting the transmission time interval of the predetermined service data.
  • the downlink control information is sent in a transmission time interval.
  • the indication information is represented by one bit, where “1” indicates that the predetermined service data is sent in the next transmission time interval, and “0” indicates that the predetermined service data is sent in the current transmission time interval; or
  • the indication information is represented by two bits, where “10” indicates that the predetermined service data is sent after the second transmission time, and "01” indicates that the predetermined service data is sent in the next transmission time interval, "00” Indicates that the predetermined service data is sent in the current transmission time interval.
  • the network side determines that the downlink control information is sent when the following conditions are met: the wideband channel quality indicator (CQI) fed back by the user equipment is smaller than the wideband channel quality indication threshold; or the uplink corresponding to the downlink service data No signal is detected on the HARQ feedback channel; or, no signal is detected on the uplink traffic channel.
  • CQI wideband channel quality indicator
  • the present invention also provides a downlink control information transmission system, the system comprising:
  • a downlink control information sending module on the network side, configured to: send at least two downlink control information related to the predetermined service data to the user equipment, where the indication information of the predetermined service data transmission time interval ( ⁇ ) is carried;
  • the control information receiving and parsing module of the user equipment is configured to: receive and parse the downlink control information.
  • the indication information is an absolute position or a relative position of a transmission time interval
  • the downlink control information sending module of the network side is configured to: transmit a time interval of transmission of the predetermined service data and/or a previous transmission time interval The downlink control information is sent.
  • the indication information is represented by one bit, where “1” indicates that the predetermined service data is sent in the next transmission time interval, and “0” indicates that the predetermined service data is sent in the current transmission time interval; or
  • the indication information is represented by two bits, where “10” indicates that the predetermined service data is sent after the second transmission time, and "01” indicates that the predetermined service data is sent in the next transmission time interval, "00” Indicates that the predetermined service data is sent in the current transmission time interval.
  • the downlink control information sending module on the network side is configured to: send the downlink control information when determining that any of the following conditions is met:
  • the wideband channel quality indicator (CQI) fed back by the user equipment is smaller than the wideband channel quality indicator Threshold; or, no signal is detected on the uplink HARQ feedback channel corresponding to the downlink service data; or, no signal is detected on the uplink traffic channel.
  • a downlink control information sending apparatus comprising: a downlink control information sending module, configured to: be located at a network side, and send at least two downlink control information related to predetermined service data to a user equipment, where the downlink control information carries The indication information of the predetermined service data transmission time interval (TTI).
  • TTI predetermined service data transmission time interval
  • the indication information is an absolute position or a relative position of a transmission time interval
  • the downlink control information sending module is configured to: send a transmission time interval and/or a previous transmission time interval of the predetermined service data Describe the downlink control information.
  • the indication information is represented by one bit, where “1” indicates that the predetermined service data is sent in the next transmission time interval, and “0” indicates that the predetermined service data is sent in the current transmission time interval; or
  • the indication information is represented by two bits, where “10” indicates that the predetermined service data is sent after the second transmission time, and "01” indicates that the predetermined service data is sent in the next transmission time interval, "00” Indicates that the predetermined service data is sent in the current transmission time interval.
  • the downlink control information sending module is configured to: send the downlink control information when determining that any of the following conditions is met:
  • the wideband channel quality indicator (CQI) fed back by the user equipment is smaller than the wideband channel quality indication threshold; or no signal is detected on the uplink HARQ feedback channel corresponding to the downlink service data; or, no detection is detected on the uplink traffic channel. signal.
  • the embodiment of the present invention increases the probability that the user equipment (UE) successfully receives the downlink control information related to the predetermined service data by transmitting at least two downlink control information related to the predetermined service data in one or more TTI ranges. Thereby, the coverage performance of the downlink control channel is improved, and the coverage balance of different downlink control channels is finally realized.
  • UE user equipment
  • FIG. 1 is a schematic diagram of a downlink control information transmission method according to an embodiment of the present invention.
  • 2 is a schematic diagram of two PDCCHs being transmitted in the same TTI
  • FIG. 3 is a schematic diagram of two PDCCHs being transmitted in different TTIs
  • FIG. 6 is a schematic diagram of a downlink control information transmission system according to an embodiment of the present invention.
  • the downlink control information transmission method of the present invention includes:
  • Step 101 The network side sends at least two downlink control information related to the predetermined service data to the user equipment, where the indication information of the scheduled service data transmission time interval (TTI) is carried.
  • TTI scheduled service data transmission time interval
  • the conditions for the network side to send the downlink control information to the user equipment include:
  • the wideband channel quality indicator (CQI) fed back by the user equipment is smaller than the wideband channel quality indication threshold; or no signal is detected on the uplink HARQ feedback channel corresponding to the downlink service data; or, no detection is detected on the uplink traffic channel. signal.
  • the indication information includes an absolute location of the TTI (e.g., an index of the TTI) or a relative location (e.g., the number of intervals of the TTI for transmitting the predetermined service data and the downlink control information).
  • an absolute location of the TTI e.g., an index of the TTI
  • a relative location e.g., the number of intervals of the TTI for transmitting the predetermined service data and the downlink control information.
  • the TTI of the downlink control information sent by the network side to the user equipment does not exceed the TTI of the predetermined service data.
  • the network side sends the TTI of the predetermined service data and/or the previous TTI.
  • the downlink control information Understandably, the downlink control information is the same or different from the predetermined service data.
  • the indication information of the predetermined service data is used to indicate the defect of the predetermined service data in a relative position manner, two or more downlink control information related to the predetermined service data are in the same state.
  • the bearer downlink control signaling (including the indication information of the predetermined service data )) is the same; two or more downlink control information that is different from the predetermined service data, and the indication information of the predetermined service data ⁇ carried Different, the other downlink control signaling carried is the same.
  • the network side further includes: sending, by the network side, the predetermined service data to the user equipment according to the downlink control information.
  • the downlink control information is sent by a physical channel carrying downlink control signaling, such as a physical downlink control channel (PDCCH) of the LTE system.
  • a physical channel carrying downlink control signaling such as a physical downlink control channel (PDCCH) of the LTE system.
  • PDCCH physical downlink control channel
  • the method further includes: receiving, according to the downlink control information, the scheduled service data from the network side or to the network side.
  • the present invention increases the probability that a user equipment (UE) successfully receives downlink control information related to the predetermined service data by transmitting at least two downlink control information related to predetermined service data in one or more TTI ranges, thereby further The coverage performance of the downlink control channel is improved, and the coverage balance of different downlink control channels is finally realized.
  • UE user equipment
  • the PDCCH payload is equivalent to the downlink control information.
  • Table 1 shows an example of the payload of the downlink control signaling delivered by the PDCCH, specifically the LTE Downlink Control Information (DCI) format la, as shown in Table 1.
  • DCI Downlink Control Information
  • Carrier indication Indicates the component carrier carrying the service data.
  • Virtual resource block allocation flag Indicates centralized or distributed resource allocation
  • Resource block allocation Indicates the assigned logical resource location
  • Modulation coding scheme indicating modulation mode and coding rate
  • New data indicator Indicates that the business data is new or retransmitted
  • Redundant version Indicates the location of the first or retransmitted data in the entire encoded data
  • the predetermined service data TTI indication information indicates the location of the TTI where the predetermined service data is located.
  • the PUCCH in the above table is an abbreviation of Physical Uplink Control Channel.
  • the serving base station of UE1 is B1, and the current B1 is the service data of UE1.
  • UE1 feeds back the channel quality indicator (CQI) information of B1, and B1 knows the predetermined wideband channel quality indication threshold (recorded as 73 ⁇ 4mv 2 Ce). / ).
  • the broadband channel quality indicator includes a Signal to Interference and Noise Ratio (SINR) indication, a Modulation Coding Scheme (MCS) indication, and other indications that can be converted into SINR parameters.
  • SINR Signal to Interference and Noise Ratio
  • MCS Modulation Coding Scheme
  • This embodiment temporarily considers that the CQI is equivalent to the signal to interference and noise ratio indication.
  • the CQI fed back by the UE1 is denoted as C / ⁇
  • the base station B1 judges that C / c ⁇ is smaller than the threshold of the threshold ⁇ s / ce / value, and uses the transmission method of the PDCCH as shown in FIG. 2 or 3. Specifically, as shown in FIG.
  • the indication information of the user equipment service data TTI of the payload of the PDCCH includes 1 bit, and all are set to "0", indicating that the current TTI includes service data related to UE1; when UE1 successfully receives and parses at least one of the stations
  • UE1 can correctly acquire and detect downlink service data related thereto, or send uplink service data related thereto. Specifically, as shown in FIG.
  • the PDCCH related to the UE1 service data is respectively transmitted in the second and third ranges, that is, the PDCCH related to the UE1 service data is in two consecutive TTI ranges.
  • Two fields are transmitted, and the payloads of the two PDCCHs transmitted are identical except for the indication information of the user equipment service data TTI, where the indication information of the user equipment service data TTI includes 1 bit, and
  • the indication information of the user equipment service data TTI of the PDCCH payload in the second TTI range is set to "1", indicating that the next TTI contains service data related to UE1, and the current TTI does not include UE1 related
  • the service data, the indication information of the user equipment service data TTI of the PDCCH payload in the third TTI range is set to "0", indicating that the current TTI includes service data related to UE1; when UE1 successfully receives and parses at least When one of the PDCCHs is present, UE1 can correctly acquire and detect downlink service data related thereto or transmit uplink service
  • the PDCCH related to the service data of the UE1 is not limited to being transmitted at most twice, and the indication information of the user equipment service data TTI of its payload is not limited to one bit length.
  • the PDCCH related to the UE1 service data is respectively transmitted in the first, second, and third TTIs, that is, the PDCCH related to the UE1 service data is in three consecutive TTI ranges.
  • the payloads of the three PDCCHs transmitted are identical except for the indication information of the user equipment service data TTI, where the indication information of the user equipment service data TTI includes 2 bits, and The indication information of the user equipment service data PDCCH of the PDCCH payload in one TTI range is set to "10", indicating that the second, third, and third TTIs include service data related to UE1, and the current TTI does not include UE1 related service data, the indication information of the user equipment service data TTI of the PDCCH payload in the second TTI range is set to "01", indicating that the subsequent first, third, TTI includes the service related to UE1.
  • the current TTI does not include the service data related to the UE1, and the indication information of the user equipment service data TTI of the PDCCH payload in the third TTI range is set to "00", indicating the current TTI packet.
  • the service data related to the UE1 is included.
  • the UE1 successfully receives and parses one of the PDCCHs, the UE1 can correctly acquire and detect downlink service data related thereto or send uplink service data related thereto.
  • the serving base station of UE1 is B1, and the current B1 is the service data of UE1.
  • UE1 feeds back the channel quality indicator (CQI) information of B1, and B1 knows the predetermined wideband channel quality indication threshold (recorded as 73 ⁇ 4mv 2 Ce). / ).
  • the broadband channel quality indicator includes a Signal to Interference and Noise Ratio (SINR) indication, a Modulation Coding Scheme (MCS) indication, and other indications that can be converted into SINR parameters.
  • SINR Signal to Interference and Noise Ratio
  • MCS Modulation Coding Scheme
  • This embodiment temporarily considers that the CQI is equivalent to the signal to interference and noise ratio indication.
  • the CQI fed back by the UE1 is denoted as C / ⁇
  • the base station B1 judges that C /c ⁇ is not smaller than the threshold value of the background value of the PDCCH, and the transmission method of the PDCCH as shown in FIG. 5 is used.
  • the transmission method of the PDCCH as shown in FIG. 5 is used. Specifically, as shown in FIG.
  • a PDCCH related to UE1 service data is sent, where the user equipment service data TTI of the payload of the PDCCH related to the UE1 service data is
  • the indication message contains only 1 bit and is set to "0", indicating that The pre-TTI includes service data related to UE1; when UE1 successfully receives and parses the unique PDCCH, UE1 can correctly acquire and detect downlink service data related thereto or transmit uplink service data related thereto.
  • the indication information of the user equipment service data ⁇ of the PDCCH payload is not limited to one bit length.
  • the indication information of the user equipment service data TTI of the payload of the PDCCH includes 2 bits and is set to "00", indicating that the current ⁇ includes service data related to the UE1; when the UE1 successfully receives and parses the unique PDCCH At the same time, UE1 can correctly acquire and detect downlink service data related thereto or transmit uplink service data related thereto.
  • This embodiment temporarily assumes that UE1 has not successfully detected the unique PDCCH.
  • the UE1 cannot correctly acquire and detect the downlink service data related thereto, so that no information is fed back on the uplink HARQ feedback channel (PUCCH) corresponding to the downlink service data, so that the base station B1 is on the HARQ feedback channel. No signal can be detected; or UE1 cannot send uplink service data related thereto, causing base station B1 to detect no signal on the relevant uplink traffic channel.
  • the base station B1 uses the transmission method of the PDCCH as shown in Fig. 2 or 3.
  • the indication information of the user equipment service data TTI of the payload of the PDCCH includes 1 bit, and all are set to "0", indicating that the current TTI includes service data related to UE1; when UE1 successfully receives and parses at least one of the stations
  • UE1 can correctly acquire and detect downlink service data related thereto, or send uplink service data related thereto.
  • FIG. 2 shows that in the second TTI range, two PDCCHs related to UE1 service data are transmitted, and the payloads of the two PDCCHs transmitted are completely the same, where the two transmitted
  • the indication information of the user equipment service data TTI of the payload of the PDCCH includes 1 bit, and all are set to "0", indicating that the current TTI includes service data related to UE1; when UE1 successfully receives and parses at least one of the stations
  • UE1 can correctly acquire and detect downlink service data related thereto, or send uplink service data related thereto.
  • the PDCCH related to the UE1 service data is respectively sent in the second and third ranges, that is, the PDCCH related to the UE1 service data is in two consecutive TTI ranges.
  • Two fields are transmitted, and the payloads of the two PDCCHs transmitted are identical except for the indication information of the user equipment service data TTI, where the indication information of the user equipment service data TTI includes 1 bit, and
  • the indication information of the user equipment service data PDCCH of the PDCCH payload in the second TTI range is set to "1", indicating that the next TTI contains service data related to UE1, and the current TTI does not include UE1 related
  • the service data, the indication information of the user equipment service data TTI of the PDCCH payload in the third TTI range, is set to "0", indicating that the current TTI includes the UE1 related industry
  • the PDCCH related to the service data of the UE1 is not limited to being transmitted at most twice, and the indication information of the user equipment service data TTI of its payload is not limited to one bit length.
  • the PDCCH related to the UE1 service data is respectively transmitted in the first, second, and third TTIs, that is, the PDCCH related to the UE1 service data is in three consecutive TTI ranges.
  • the payloads of the three PDCCHs transmitted are identical except for the indication information of the user equipment service data TTI, where the indication information of the user equipment service data TTI includes 2 bits, and The indication information of the user equipment service data PDCCH of the PDCCH payload in one TTI range is set to "10", indicating that the second, third, and third TTIs include service data related to UE1, and the current TTI does not include UE1 related service data, the indication information of the user equipment service data TTI of the PDCCH payload in the second TTI range is set to "01", indicating that the subsequent first, third, TTI includes the service related to UE1.
  • the current TTI does not include service data related to UE1, and the user equipment service data TTI of the PDCCH payload in the third TTI range
  • the information is set to "00", indicating that the current TTI contains service data related to UE1; when UE1 successfully receives and parses one of the PDCCHs at least, UE1 can correctly acquire and detect downlink service data related thereto or transmit it related thereto. Upstream business data.
  • the indication information of the user equipment service data TTI of the PDCCH payload includes only 1 bit, at most supports transmission of two PDCCHs located in different TTIs related to predetermined service data; if the PDCCH payload The user equipment service data TTI indication information contains 2 bits, and at most supports transmission of four PDCCHs located in different TTIs related to predetermined service data; and so on.
  • the PDCCH resources shown in Figures 2 to 5 are actually logical resources (CCE), that is, the corresponding physical resources (REG) may not be continuous.
  • the present invention provides a downlink control information transmission method that is simple to implement and has superior performance.
  • the method increases by transmitting at least two downlink control information related to predetermined service data in one or more TTI ranges.
  • the present invention further provides an embodiment of a downlink control information transmission system.
  • the system includes:
  • a downlink control information sending module on the network side configured to send, to the user equipment, at least two downlink control information related to the predetermined service data, where the indication information of the predetermined service data TTI is carried, and the control information receiving and parsing module of the user equipment, And configured to receive and parse the downlink control information.
  • the downlink control information is sent through a physical downlink control channel.
  • the system further includes a service data transceiver module on the network side, configured to send or receive the predetermined service data from the user equipment according to the downlink control information.
  • a service data transceiver module on the network side, configured to send or receive the predetermined service data from the user equipment according to the downlink control information.
  • the system further includes a service data transceiver module of the user equipment, where the user equipment receives or sends the predetermined service data from the network side according to the downlink control information.
  • the service data receiving module constitutes another embodiment of the downlink control information transmission system of the present invention.
  • the indication information is an absolute position or a relative position of a transmission time interval.
  • the downlink control information sending module on the network side sends the downlink control information in a transmission time interval and/or a previous transmission time interval in which the predetermined service data is transmitted.
  • the downlink control information sending module of the network side sends the downlink control information when determining that any of the following conditions is met:
  • the wideband channel quality indicator (CQI) fed back by the user equipment is less than a wideband channel quality indication threshold; or
  • the indication information is represented by one bit, where "1" indicates that the predetermined service data is sent in the next transmission time interval, and "0" indicates that the predetermined service data is sent in the current transmission time interval; or, The indication information is represented by two bits, where "10” indicates that the predetermined service data is sent after the second transmission time, and "01” indicates that the predetermined service data is sent in the next transmission time interval, "00”” indicates that the predetermined service data is sent in the current transmission time interval.
  • a downlink control information sending apparatus includes:
  • a downlink control information sending module configured to: be located at the network side, and send, to the user equipment, at least two downlink control information related to the predetermined service data, where the downlink control information carries the predetermined service data transmission time interval (TTI) Instructions.
  • TTI transmission time interval
  • the indication information is an absolute position or a relative position of a transmission time interval
  • the downlink control information sending module is configured to: send a transmission time interval and/or a previous transmission time interval of the predetermined service data Describe the downlink control information.
  • the indication information is represented by one bit, where “1" indicates that the predetermined service data is sent in the next transmission time interval, and “0" indicates that the predetermined service data is sent in the current transmission time interval; or
  • the indication information is represented by two bits, where “10” indicates that the predetermined service data is sent after the second transmission time, and “01” indicates that the predetermined service data is sent in the next transmission time interval, “00” " indicates that the predetermined service data is sent in the current transmission time interval.
  • the downlink control information sending module is configured to: send the downlink control information when determining that any of the following conditions is met:
  • the wideband channel quality indicator (CQI) fed back by the user equipment is less than a wideband channel quality indication threshold; or
  • the embodiment of the present invention increases that a user equipment (UE) successfully receives downlink control information related to the predetermined service data by transmitting at least two downlink control information related to predetermined service data in one or more TTI ranges. The probability of the downlink control channel is improved, and the coverage balance of different downlink control channels is finally realized.
  • UE user equipment

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Abstract

下行控制信息传输方法和***,该方法包括:网络侧向用户设备下发至少两个与预定业务数据有关的下行控制信息,其中携带所述预定业务数据传输时间间隔(TTI)的指示信息;所述用户设备接收并解析所述下行控制信息。下行控制信息传输方法和***增加了用户设备成功接收下行控制信息的概率,提高了下行控制信道的覆盖性能。

Description

下行控制信息传输方法和***
技术领域
本发明涉及无线通信领域, 具体涉及一种长期演进***(LTE ) 的下行 控制信息传输方法和***。 背景技术
通用移动通信*** ( Universal Mobile Telecommunications System, 简称 UMTS )陆地无线接入与无线接入网络的长期演进(Long Term Evolution, 简 称 LTE )属于***(Fourth Generation, 简称 4G )无线宽带技术。 LTE系 统能够提供高的峰值数据速率(下行 lOOMps, 上行 50Mps ) , 低的时延(环 回时延 10ms ) , 改善的***容量与覆盖以及缩减的运营成本; 另外, 它还支 持多天线, 高效的分组数据传输, 灵活的带宽操作(至多为 20MHz ) 以及无 缝的与现有***的整合。 这使高效的与可靠的控制信道设计成为必需。 具体 地下行(Downlink, 简称 DL )控制信令包含调度授予, 控制格式指示以及混 合自动重传请求(Hybrid Automatic Repeat-ReQuest, 简称 HARQ )确认。
所述 LTE***基于正交频分复用 (Orthogonal Frequency Division Multiplexing, 简称 OFDM ) , 每下行帧持续 10ms, 包含 10个子帧, 每子帧包含 两个时隙, 每时隙包含 6或 7个 OFDM符号。 下行控制信令位于每子帧最前 面的 w (小于等于 3 )个 OFDM符号。 下行控制信令被以下三个物理信道承 载: 物理控制格式指示信道( Physical Control Format Indicator Channel, 简称 PCFICH ) , 用于指示子帧内用于控制的 OFDM符号数(即所述《值) ; 物 理 HARQ指示信道 ( Physical HARQ Indicator Channel, 简称 PHICH ) , 承载 与上行数据传输有关的下行肯定 /否定确认 ( Acknowledgement/Negative Acknowledge, 简称 ACK/NACK ) ; 物理下行控制信道 ( Physical Downlink Control Channel, 简称 PDCCH ) , 承载下行调度分配与上行调度授予。 每子 帧有多个 PDCCH, 用户设备 ( User Equipment, 简称 UE )如果被调度, 可以 被分配一个或多个 PDCCH。 其中, PDCCH传输的最小单元是控制信道单元 ( Control Channel Element, 简称 CCE ) , 一个 PDCCH包含一个或多个 CCE, 每 CCE包含 9个资源单元组( Resource Element Group, 简称 REG ) ,每 REG 包含 4 个非导频资源单元或子载波。 四相相移键控 ( Quadrature Phase Shift Keying, 简称 QPSK ) 总是被用于 PDCCH, 因此, 一个 CCE包含 72个编码 比特。每 PDCCH承载与一个或多个 UE有关的具有不同有效载荷大小的信息, 并可以使用不同的控制格式进行传输。 UE通过盲检测的方式实时监视不同的 PDCCH格式, 并检测出与自己相关的 PDCCH。
关于 LTE下行控制信道覆盖, 已有的仿真结果表明, PHICH覆盖性能最 优, 其次是 PCFICH, 最后是 PDCCH, 即 LTE下行控制信道的覆盖受限于 PDCCH。 类似的, 相关的其它无线通信***也存在特定下行控制信道覆盖受 限的问题。 发明内容
本发明要解决的技术问题是提供一种下行控制信息传输方法和***以解 决下行控制信道覆盖受限的问题。
为解决以上技术问题, 本发明提供了一种下行控制信息传输方法, 该方 法包括:
网络侧向用户设备下发至少两个与预定业务数据有关的下行控制信息, 其中携带所述预定业务数据传输时间间隔 (TTI ) 的指示信息;
所述用户设备接收并解析所述下行控制信息。
优选地, 所述网络侧向用户设备下发所述下行控制信息后, 该方法还包 括: 所述网络侧根据所述下行控制信息向用户设备下发或从用户设备接收所 述预定业务数据。
优选地, 所述用户设备成功接收并解析至少一个所述下行控制信息后, 该方法还包括: 根据所述下行控制信息, 从网络侧接收或向网络侧发送所述 预定业务数据。
可选地, 所述下行控制信息通过物理下行控制信道(PDCCH )发送。 可选地, 所述指示信息是传输时间间隔的绝对位置或相对位置。
优选地, 所述网络侧在发送所述预定业务数据的传输时间间隔和 /或之前 的传输时间间隔下发所述下行控制信息。
优选地, 所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时 间间隔下发所述预定业务数据, "0"表示当前传输时间间隔下发所述预定业 务数据; 或, 所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二 个传输时间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所 述预定业务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
优选地, 所述网络侧判断满足以下任一条件时下发所述下行控制信息: 所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限;或,在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
为解决以上技术问题, 本发明还提供了一种下行控制信息传输***, 该 ***包括:
网络侧的下行控制信息发送模块, 其设置为: 向用户设备下发至少两个 与预定业务数据有关的下行控制信息 , 其中携带所述预定业务数据传输时间 间隔 (ΤΉ ) 的指示信息;
用户设备的控制信息接收解析模块, 其设置为: 接收并解析所述下行控 制信息。
优选地, 所述指示信息是传输时间间隔的绝对位置或相对位置, 所述网 络侧的下行控制信息发送模块设置为: 在发送所述预定业务数据的传输时间 间隔和 /或之前的传输时间间隔下发所述下行控制信息。
优选地, 所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时 间间隔下发所述预定业务数据, "0"表示当前传输时间间隔下发所述预定业 务数据; 或, 所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二 个传输时间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所 述预定业务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
优选地, 所述网络侧的下行控制信息发送模块设置为: 判断满足以下任 一条件时下发所述下行控制信息:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限;或,在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
一种下行控制信息发送装置, 包括: 下行控制信息发送模块, 其设置为: 位于网络侧,向用户设备下发至少两个与预定业务数据有关的下行控制信息, 所述下行控制信息中携带所述预定业务数据传输时间间隔( TTI )的指示信息。
优选地, 所述指示信息是传输时间间隔的绝对位置或相对位置, 所述下行控制信息发送模块设置为: 在发送所述预定业务数据的传输时 间间隔和 /或之前的传输时间间隔下发所述下行控制信息。
优选地, 所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时 间间隔下发所述预定业务数据, "0"表示当前传输时间间隔下发所述预定业 务数据; 或, 所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二 个传输时间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所 述预定业务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
优选地, 所述下行控制信息发送模块设置为: 判断满足以下任一条件时 下发所述下行控制信息:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限;或,在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
本发明实施例通过在一个或多个 TTI范围内发送至少两个与预定业务数 据有关的下行控制信息, 增加了用户设备 ( UE )成功接收与所述预定业务数 据有关的下行控制信息的概率, 从而提高了下行控制信道的覆盖性能, 最终 实现了不同下行控制信道的覆盖平衡。 附图概述
图 1是本发明实施例下行控制信息传输方法的示意图;
图 2是两个 PDCCH在同一 TTI被发送的示意图;
图 3是两个 PDCCH在不同 TTI被发送的示意图;
图 4是三个 PDCCH在不同 TTI被发送的示意图; 图 5是一个 PDCCH在特定 TTI被发送的示意图;
图 6是本发明实施例下行控制信息传输***的示意图。
本发明的较佳实施方式
如图 1所示, 本发明下行控制信息传输方法包括:
步骤 101 : 网络侧向用户设备下发至少两个与预定业务数据有关的下行 控制信息, 其中携带所述预定业务数据传输时间间隔 (Transmission Time Internal , 简称 TTI ) 的指示信息。
所述网络侧向用户设备下发所述下行控制信息的条件包括:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限;或,在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
所述指示信息包括 TTI的绝对位置 (如 TTI的索引 )或相对位置 (如发 送所述预定业务数据与下行控制信息的 TTI的间隔数 ) 。
所述网络侧向用户设备下发所述下行控制信息的 TTI不超过所述预定业 务数据的 TTI, 具体地, 所述网络侧在发送所述预定业务数据的 TTI和 /或之 前的 TTI下发所述下行控制信息。 可理解地, 所述下行控制信息与预定业务 数据处于相同或不相同的 ΤΉ。
可理解的, 若所述预定业务数据 ΤΤΙ的指示信息, 釆用 ΤΤΙ的相对位置 方式表示所述预定业务数据的 ΤΤΙ, 则两个或多个与预定业务数据有关的处 于相同 ΤΉ的下行控制信息承载的下行控制信令(包括所述预定业务数据 ΤΉ 的指示信息)相同; 两个或多个与预定业务数据有关的处于不同 ΤΤΙ的下行 控制信息, 承载的所述预定业务数据 ΤΤΙ的指示信息不相同, 承载的其它下 行控制信令相同。
所述网络侧向用户设备下发所述下行控制信息之后还包括: 网络侧根据 所述下行控制信息向用户设备下发或从用户设备接收所述预定业务数据。
优选地, 所述下行控制信息通过承载下行控制信令的物理信道(如 LTE ***的物理下行控制信道(PDCCH ) )发送。 步骤 102: 所述用户设备接收并解析所述下行控制信息。
所述用户设备成功接收并解析至少一个所述下行控制信息之后,还包括: 根据所述下行控制信息, 从网络侧接收或向网络侧发送所述预定业务数据。
本发明通过在一个或多个 TTI范围内发送至少两个与预定业务数据有关 的下行控制信息, 增加了用户设备 ( UE )成功接收与所述预定业务数据有关 的下行控制信息的概率, 从而进一步地提高了下行控制信道的覆盖性能, 最 终实现了不同下行控制信道的覆盖平衡。
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。
以 LTE***的 PDCCH信道为例。说明, 在以下实施例中, PDCCH有效 载荷等价于下行控制信息。
表 1为通过 PDCCH下发的下行控制信令的有效载荷示例, 具体为 LTE 下行控制信息( Downlink Control Information, 简称 DCI )格式 la, 如表 1所 示。
表 1 DCI格式 la
载波指示 指示承载业务数据的成员载波 格式 0/格式 la区分标志 _
虚拟资源块分配标志 指示集中式或分布式资源分配
资源块分配 指示分配的逻辑资源位置
调制编码方案 指示调制方式与编码速率
HARQ进程编号 _
新数据指示符 指示业务数据为新数据或重传数据
冗余版本 指示首传或重传的数据在整个已编码数据中的位置
PUCCH功率控制命令 _
探测参考信号请求 _
预定业务数据 TTI指示信息 指示预定业务数据所在 TTI的位置 上表中 PUCCH是物理上行控制信道( Physical Uplink Control Channel ) 简称。
实施例一
假设 UE1的服务基站为 B1 , 当前 B1为 UE1传输业务数据, UE1向 B1 反馈宽带信道质量指示(Channel Quality Indicator, 简称 CQI )信息, B1已知 预定的宽带信道质量指示门限(记为 7¾mv 2Ce/ ) 。 具体地, 所述宽带信道质 量指示包括信干噪比 ( Signal to Interference and Noise Ratio, 简称 SINR )指 示, 调制编码方案( Modulation Coding Scheme , 简称 MCS )指示以及其它能 够转化为 SINR的参数的指示。
本实施例暂且认为所述 CQI等价于所述信干噪比指示。
具体地, 假设 UE1反馈的 CQI记为 C /^, 并且基站 B1判断 C /c^ 小于所述门限 7¾re*¾ce /值, 釆用如图 2或 3所示的 PDCCH的传输方法。 具 体地, 如图 2所示, 在第 2个 TTI范围内, 与 UE1业务数据有关的 PDCCH 被发送了两个, 并且发送的两个 PDCCH的有效载荷完全相同, 其中, 所述 发送的两个 PDCCH的有效载荷的用户设备业务数据 TTI的指示信息包含 1 个比特, 且全部被设置为 "0" , 表示当前的 TTI包含与 UE1有关的业务数 据; 当 UE1至少成功接收并解析其中的一个所述 PDCCH时, UE1能够正确 获取并检测与其相关的下行业务数据, 或者发送与其相关的上行业务数据。 具体地,如附图 3所示,与 UE1业务数据有关的 PDCCH在第 2与第 3个 ΤΉ 范围内分别被发送了一个, 即所述与 UE1业务数据有关的 PDCCH在连续的 两个 TTI范围内被发送了两个, 并且所述发送的两个 PDCCH的有效载荷除 用户设备业务数据 TTI的指示信息以外的其它字段完全相同, 其中, 用户设 备业务数据 TTI的指示信息包含 1个比特,并且在第 2个 TTI范围内的 PDCCH 有效载荷的用户设备业务数据 TTI的指示信息, 被设置为 "1" , 表示下一个 TTI包含与 UE1有关的业务数据, 而当前的 TTI不包含与 UE1有关的业务数 据, 在第 3个 TTI范围内的 PDCCH有效载荷的用户设备业务数据 TTI的指 示信息, 被设置为 "0" , 表示当前 TTI包含与 UE1有关的业务数据; 当 UE1 至少成功接收并解析其中的一个所述 PDCCH时, UE1能够正确获取并检测 与其相关的下行业务数据或者发送与其相关的上行业务数据。 另外, 所述与 UE1的业务数据有关的 PDCCH, 并不局限于至多发送两 次, 它的有效载荷的用户设备业务数据 TTI的指示信息, 也并不局限于 1个 比特长度。 例如如附图 4所示, 与 UE1业务数据有关的 PDCCH在第 1、 第 2 与第 3个 TTI内分别被发送了一个, 即所述与 UE1业务数据有关的 PDCCH 在连续的三个 TTI范围内被发送了三个, 并且发送的三个 PDCCH的有效载 荷除了用户设备业务数据 TTI的指示信息以外的其它字段完全相同, 其中, 用户设备业务数据 TTI的指示信息包含 2个比特, 并且在第 1个 TTI范围内 的 PDCCH有效载荷的用户设备业务数据 ΤΉ的指示信息被设置为 "10" , 表示随后的第 2个即第 3个 TTI包含与 UE1有关的业务数据, 当前的 TTI不 包含与 UE1有关的业务数据, 在第 2个 TTI范围内的 PDCCH有效载荷的用 户设备业务数据 TTI的指示信息被设置为 "01" , 表示随后的第 1个即第 3 个 TTI包含与 UE1有关的业务数据,当前 TTI不包含与 UE1有关的业务数据, 在第 3个 TTI范围内的 PDCCH有效载荷的用户设备业务数据 TTI的指示信 息被设置为 "00" , 表示当前 TTI包含与 UE1有关的业务数据; 当 UE1至少 成功接收并解析其中的一个所述 PDCCH时, UE1能够正确获取并检测与其 相关的下行业务数据或者发送与其相关的上行业务数据。
实施例二
假设 UE1的服务基站为 B1 , 当前 B1为 UE1传输业务数据, UE1向 B1 反馈宽带信道质量指示(Channel Quality Indicator, 简称 CQI )信息, B1已知 预定的宽带信道质量指示门限(记为 7¾mv 2Ce/ ) 。 具体地, 所述宽带信道质 量指示包括信干噪比 ( Signal to Interference and Noise Ratio, 简称 SINR )指 示, 调制编码方案( Modulation Coding Scheme , 简称 MCS )指示以及其它能 够转化为 SINR的参数的指示。
本实施例暂且认为所述 CQI等价于所述信干噪比指示。
具体地, 假设 UE1反馈的 CQI记为 C /^ , 并且基站 B1判断 C /c^ 不小于所述门限 7¾re*¾ /值, 釆用如图 5所示的 PDCCH的传输方法。 具体 地, 如图 5所示, 在第 2个 TTI范围内, 与 UE1业务数据有关的 PDCCH被 发送了一个, 其中, 所述与 UE1业务数据有关的 PDCCH的有效载荷的用户 设备业务数据 TTI的指示信息只包含 1个比特, 并且被设置为 "0" , 表示当 前 TTI包含与 UE1有关的业务数据;当 UE1成功接收并解析所述唯一 PDCCH 时, UE1 能够正确获取并检测与其相关的下行业务数据或者发送与其相关的 上行业务数据。 另外, 所述 PDCCH有效载荷的用户设备业务数据 ΤΉ的指 示信息也并不局限于 1个比特长度。 具体地, 所述 PDCCH的有效载荷的用 户设备业务数据 TTI的指示信息包含 2比特且被设置为 "00" ,表示当前 ΤΉ 包含与 UE1有关的业务数据; 当 UE1成功接收并解析所述唯一 PDCCH时, UE1 能够正确获取并检测与其相关的下行业务数据或者发送与其相关的上行 业务数据。
本实施例暂且假设 UE1没有成功检测出所述唯一 PDCCH。
此时, UE1无法正确获取并检测与其相关的下行业务数据, 从而不会在 与所述下行业务数据对应的上行 HARQ反馈信道( PUCCH )上反馈任何信息, 导致基站 B1在所述 HARQ反馈信道上检测不出任何信号; 或者 UE1无法发 送与其相关的上行业务数据 ,导致基站 B1在相关上行业务信道上检测不出任 何信号。 接下来, 基站 B1釆用如图 2或 3所示的 PDCCH的传输方法。
具体地, 如图 2所示, 在第 2个 TTI范围内, 与 UE1业务数据有关的 PDCCH被发送了两个,并且发送的两个 PDCCH的有效载荷完全相同,其中, 所述发送的两个 PDCCH的有效载荷的用户设备业务数据 TTI的指示信息包 含 1个比特, 且全部被设置为 "0" , 表示当前的 TTI包含与 UE1有关的业 务数据; 当 UE1至少成功接收并解析其中的一个所述 PDCCH时, UE1能够 正确获取并检测与其相关的下行业务数据, 或者发送与其相关的上行业务数 据。 具体地, 如附图 3所示, 与 UE1业务数据有关的 PDCCH在第 2与第 3 个 ΤΉ范围内分别被发送了一个, 即所述与 UE1业务数据有关的 PDCCH在 连续的两个 TTI范围内被发送了两个, 并且所述发送的两个 PDCCH的有效 载荷除用户设备业务数据 TTI的指示信息以外的其它字段完全相同, 其中, 用户设备业务数据 TTI的指示信息包含 1个比特, 并且在第 2个 TTI范围内 的 PDCCH有效载荷的用户设备业务数据 ΤΉ的指示信息, 被设置为 "1" , 表示下一个 TTI包含与 UE1有关的业务数据, 而当前的 TTI不包含与 UE1 有关的业务数据, 在第 3个 TTI范围内的 PDCCH有效载荷的用户设备业务 数据 TTI的指示信息, 被设置为 "0" , 表示当前 TTI包含与 UE1有关的业 务数据; 当 UE1至少成功接收并解析其中的一个所述 PDCCH时, UE1能够 正确获取并检测与其相关的下行业务数据或者发送与其相关的上行业务数 据。
另外, 所述与 UE1的业务数据有关的 PDCCH, 并不局限于至多发送两 次, 它的有效载荷的用户设备业务数据 TTI的指示信息, 也并不局限于 1个 比特长度。 例如如附图 4所示, 与 UE1业务数据有关的 PDCCH在第 1、 第 2 与第 3个 TTI内分别被发送了一个, 即所述与 UE1业务数据有关的 PDCCH 在连续的三个 TTI范围内被发送了三个, 并且发送的三个 PDCCH的有效载 荷除了用户设备业务数据 TTI的指示信息以外的其它字段完全相同, 其中, 用户设备业务数据 TTI的指示信息包含 2个比特, 并且在第 1个 TTI范围内 的 PDCCH有效载荷的用户设备业务数据 ΤΉ的指示信息被设置为 "10" , 表示随后的第 2个即第 3个 TTI包含与 UE1有关的业务数据, 当前的 TTI不 包含与 UE1有关的业务数据, 在第 2个 TTI范围内的 PDCCH有效载荷的用 户设备业务数据 TTI的指示信息被设置为 "01" , 表示随后的第 1个即第 3 个 TTI包含与 UE1有关的业务数据,当前 TTI不包含与 UE1有关的业务数据, 在第 3个 TTI范围内的 PDCCH有效载荷的用户设备业务数据 TTI的指示信 息被设置为 "00" , 表示当前 TTI包含与 UE1有关的业务数据; 当 UE1至少 成功接收并解析其中的一个所述 PDCCH时, UE1能够正确获取并检测与其 相关的下行业务数据或者发送与其相关的上行业务数据。
注意: 1 )如果所述 PDCCH有效载荷的用户设备业务数据 TTI的指示信 息只包含 1个比特, 则至多支持与预定业务数据有关的两个位于不同 TTI的 PDCCH的传输; 如果所述 PDCCH有效载荷的用户设备业务数据 TTI指示信 息包含 2 个比特, 则至多支持与预定业务数据有关的四个位于不同 TTI 的 PDCCH的传输; 以此类推。 2 ) 图 2至 5所示的 PDCCH资源实际为逻辑资 源 (CCE ) , 即相应的物理资源 (REG )可能并不连续。
综上所述, 本发明提供了一种实现简单且性能较优的下行控制信息传输 方法, 本方法通过在一个或多个 TTI范围内发送至少两个与预定业务数据有 关的下行控制信息, 增加了用户设备 ( UE )成功接收与所述预定业务数据有 关的下行控制信息的概率, 从而进一步地提高了下行控制信道的覆盖性能, 最终实现了不同下行控制信道的覆盖平衡。
对应于前述方法, 本发明还提供了一种下行控制信息传输***实施例, 如图 6所示, 该***包括:
网络侧的下行控制信息发送模块, 用于向用户设备下发至少两个与预定 业务数据有关的下行控制信息,其中携带所述预定业务数据 TTI的指示信息; 用户设备的控制信息接收解析模块,用于接收并解析所述下行控制信息。 优选地, 所述下行控制信息通过物理下行控制信道发送。
可选地, 该***还包括网络侧的业务数据收发模块, 用于根据所述下行 控制信息向用户设备下发或从用户设备接收所述预定业务数据。
可选地, 该***还包括用户设备的业务数据收发模块, 用户设备根据所 述下行控制信息从网络侧接收或向网络侧发送所述预定业务数据。
可理解地, 以上网络侧下行控制信息发送模块、 用户设备的控制信息接 收解析模块、 网络侧的业务数据发送模块、 用户设备的业务数据接收模块、 用户设备的业务数据发送模块以及所述网络侧的业务数据接收模块组成本发 明另一下行控制信息传输***实施例。
可选地, 所述指示信息是传输时间间隔的绝对位置或相对位置。
所述网络侧的下行控制信息发送模块在发送所述预定业务数据的传输时 间间隔和 /或之前的传输时间间隔下发所述下行控制信息。
所述网络侧的下行控制信息发送模块判断满足以下任一条件时下发所述 下行控制信息:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限; 或,
在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时间间隔下 发所述预定业务数据, "0" 表示当前传输时间间隔下发所述预定业务数据; 或, 所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二个传输时 间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所述预定业 务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
一种下行控制信息发送装置, 包括:
下行控制信息发送模块, 其设置为: 位于网络侧, 向用户设备下发至少 两个与预定业务数据有关的下行控制信息 , 所述下行控制信息中携带所述预 定业务数据传输时间间隔 (TTI ) 的指示信息。
优选地, 所述指示信息是传输时间间隔的绝对位置或相对位置, 所述下行控制信息发送模块设置为: 在发送所述预定业务数据的传输时 间间隔和 /或之前的传输时间间隔下发所述下行控制信息。
优选地, 所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时 间间隔下发所述预定业务数据, "0"表示当前传输时间间隔下发所述预定业 务数据; 或,
所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二个传输时 间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所述预定业 务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
优选地, 所述下行控制信息发送模块设置为: 判断满足以下任一条件时 下发所述下行控制信息:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限; 或,
在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块可以釆用硬件 的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任何特 定形式的硬件和软件的结合。
工业实用性 本发明实施例通过在一个或多个 TTI范围内发送至少两个与预定业务数 据有关的下行控制信息, 增加了用户设备 ( UE )成功接收与所述预定业务数 据有关的下行控制信息的概率, 从而提高了下行控制信道的覆盖性能, 最终 实现了不同下行控制信道的覆盖平衡。

Claims

权 利 要 求 书
1、 一种下行控制信息传输方法, 该方法包括:
网络侧向用户设备下发至少两个与预定业务数据有关的下行控制信息, 所述下行控制信息中携带所述预定业务数据传输时间间隔( TTI )的指示信息; 所述用户设备接收并解析所述下行控制信息。
2、 如权利要求 1所述的方法,其中, 所述网络侧向用户设备下发所述下 行控制信息后, 该方法还包括: 所述网络侧根据所述下行控制信息向用户设 备下发或从用户设备接收所述预定业务数据。
3、 如权利要求 1所述的方法,其中, 所述用户设备成功接收并解析至少 一个所述下行控制信息之后还包括: 根据所述下行控制信息, 从网络侧接收 或向网络侧发送所述预定业务数据。
4、 如权利要求 1所述的方法,其中: 所述下行控制信息通过物理下行控 制信道(PDCCH )发送。
5、 如权利要求 1所述的方法,其中, 所述指示信息是传输时间间隔的绝 对位置或相对位置。
6、 如权利要求 1所述的方法,其中, 所述网络侧在发送所述预定业务数 据的传输时间间隔和 /或之前的传输时间间隔下发所述下行控制信息。
7、 如权利要求 1至 6中任一项所述的方法, 其中,
所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时间间隔下 发所述预定业务数据, "0" 表示当前传输时间间隔下发所述预定业务数据; 或,
所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二个传输时 间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所述预定业 务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
8、 如权利要求 1至 6中任一项所述的方法,其中, 所述网络侧判断满足 以下任一条件时下发所述下行控制信息:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限; 或,
在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
9、 一种下行控制信息传输***, 该***包括:
网络侧的下行控制信息发送模块, 其设置为: 向用户设备下发至少两个 与预定业务数据有关的下行控制信息, 所述下行控制信息中携带所述预定业 务数据传输时间间隔 (TTI ) 的指示信息;
用户设备的控制信息接收解析模块, 其设置为: 接收并解析所述下行控 制信息。
10、 如权利要求 9所述的***, 其中, 所述指示信息是传输时间间隔的 绝对位置或相对位置, 所述网络侧的下行控制信息发送模块设置为: 在发送 所述预定业务数据的传输时间间隔和 /或之前的传输时间间隔下发所述下行 控制信息。
11、 如权利要求 9至 10中任一项所述的***, 其中,
所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时间间隔下 发所述预定业务数据, "0" 表示当前传输时间间隔下发所述预定业务数据; 或,
所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二个传输时 间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所述预定业 务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
12、 如权利要求 9至 10中任一项所述的***,其中, 所述网络侧的下行 控制信息发送模块设置为:判断满足以下任一条件时下发所述下行控制信息: 所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限; 或, 在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
13、 一种下行控制信息发送装置, 包括:
下行控制信息发送模块, 其设置为: 位于网络侧, 向用户设备下发至少 两个与预定业务数据有关的下行控制信息 , 所述下行控制信息中携带所述预 定业务数据传输时间间隔 (TTI ) 的指示信息。
14、 如权利要求 13所述的下行控制信息发送装置, 其中,
所述指示信息是传输时间间隔的绝对位置或相对位置,
所述下行控制信息发送模块设置为: 在发送所述预定业务数据的传输时 间间隔和 /或之前的传输时间间隔下发所述下行控制信息。
15、 如权利要求 13所述的下行控制信息发送装置, 其中,
所述指示信息釆用一个比特表示, 其中 "1"表示下一个传输时间间隔下 发所述预定业务数据, "0" 表示当前传输时间间隔下发所述预定业务数据; 或,
所述指示信息釆用两个比特表示, 其中 "10" 表示之后的第二个传输时 间下发所述预定业务数据, "01" 表示下一个传输时间间隔下发所述预定业 务数据, "00" 表示当前传输时间间隔下发所述预定业务数据。
16、 如权利要求 13所述的下行控制信息发送装置, 其中,
所述下行控制信息发送模块设置为: 判断满足以下任一条件时下发所述 下行控制信息:
所述用户设备反馈的宽带信道质量指示 (CQI ) 小于宽带信道质量指示 门限; 或,
在下行业务数据对应的上行 HARQ反馈信道上检测不出任何信号; 或, 在上行业务信道上检测不出任何信号。
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